Originally Posted by
The Ancient Geek
The original discussion is about class E airspace where airlines (usually LoCos) who have moved into secondary airports are mixing with light aircraft with no transponders and often no radio. Confusion reigns and it is ony a matter of time before the airmiss reports become a nasty collision. Gliders are part of the problem and have been reported circling in thermals on the approach path quite legally.
In the US though, aren't ALL General Aviation aircraft required to have Mode C transponders as all the airspace is controlled, thereby mitigating the collision threat somewhat. Might be a cost issue in EASA states.